it's considered inadmissible, it's considered junk science. i would advice those kids not to take it. i would go a step further with the mother. i'd tell her to start naming names. if she has specific individuals who she feels are holding things back, like tamara pointed back, they may or may not be and they don't have an obligation to reveal it put some social paper on those individual, put their names in the letter, put it out there publicly. >> that is a risky thing to do. now you're risking opening yourself up to liability or defamation if you name people that are potentially involved in a crime and it didn't occur. martha: i think back to natalee holloway and her mother and how strong here she felt that that young man, joran van der sloot knew what happened, and the people who were with them had more information than they were giving. as a parent it's impossible to imagine when you know that all these people were with her. they went to a bar together, they might know a little bit about who else was there. i have to believe, keith, that th